Improvement in shingle machines



@uiten tatrs @anni @frn EMORY B. COOK, OF NORTH BELLINGHAM,MASSACHUSETTS.

` Letters Patent No. 67.724, `claztcal August 13, 1867.

IMPROVEMENT IN SHINGLE MACHINES.

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T0 ALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Bef-it known that I, EMORY B. COOK, of North Bellingham, in `the countyof Norfolk, and State'of Massachusetts, have invented a new and usefulMachine for Reducing one or more Blocks of lfvood to Shingles or Boards;and I do hereby declare the same to be fullyr described in the followingspecification, and represented in the accompanying drawings, of' which-Figure 1 is a top view,

Figure 2 a front elevation,

Figure 3 a rear elevation, and

Figure 4 a vertical and transverse section of such machine.

In such drawings, A denotes the frame of the machine, which supports insuitable bearings an arbor, B, on one end of which a circular saw, C, isfixed; a driving-pulley, D, being also fixed on the said arbor. Around agrooved wheel, a, fixed on the arbor B, an endless crossed band, b.extends, and travels on and around another grooved wheel, c, affixed ona shaft, E. One journal of the shaft E is supported in a bearing in theend of the shorter arm of a lever, F, arranged as represented in thedrawings. By moving the said lever onits fulcrum d the shaft may bemoved so as to either engage or disengage a pinion, e, with a gear, f,the said pinion e boing carried by the shaft E, and the gearf beingfixed on another shaft, G, which carries a pinion, g, to engage with agear-wheel, H, iixed on one end of a shaft, z., the whole being arrangedas represented in the drawings. To the gear H two series of guide-arms,I K, are fastened, they being extended from it in radial directions, andformed as exhibited in the drawings, each of the arms K being arrangedimmediately below two of the arms I I. Between each two ofthe guidearmsI I, and duly supported in parallel grooves, it', made in them, isacarriage, L, provided with suitable appliances for fixing to it a blockof wood, that is to say, it has one stationary toothed jaw, k, and onemovable toothed jaw, Z. The movable jaw isa lever which turns on afulcrum,`m, and is moved thereon by means of a hand-lever n, and aconnecting-rod o. The fulcrump of the hand-lever projects from a.stationary ratchet, q, extending from the carriage L. The hand-lever isprovided with a pawl, r, to engage with the teeth of the ratchet, thewhole being as exhibited in the drawings. The carriage'L rests on one ofthe arms K, or that which is interposed between its two guidearms I I.Furthermore, the said guide-arms I I are formed with auxiliary parallelvvgrooves, s s, to receive, support, and guide two racks, tt, whichextend from and are jointed to the carriage L near its two ends. .Thesetwo racks engage with one of aseries of worm-wheels, M M, which revolvefreely on arbors u, projecting from the guide-arms K K, there being oneof such worm-wheels to each of auch arms K. Against the side of each ofsuch worm-wheels a ratchet, N, is fixed, and in the orbital path ofmovement of the ratchet, and to the base-plate.O 'of the machine, aspring-click, P, is fixed. IThe object of the saideliek is to impart tothe vratchet a partial revolution while it may be in the act of passingby the click, the same causing the worm-wheelto be similarly revolved.Eachworm-wheel has three threads, or is s section of a three-threadedscrew. Each of the threads may be either a lregular or an irregularhelix in form. In case it isa regular helix the two racks willbe sooperated by it as to feed their carriage along in continual parallelismwith the face of the saw, whereby the machine would reduce the block ofwood tio boards of an even thickness. By making the threads irregularhelices of suitable forms the carriage may be made to advance with anintermittent vibratory motion, such as will cause the block of wood tobe cnt by the saw into wedges in the form of shingles'. An edge view anda side elevation of one of the worm-wheels are represented in Figures 5and 6, which exhibit the form and arrangement of their threads foreii`ecting-the vibration of the carriage while being advanced. When thecarriage reaches the extreme of its motion inward or toward the saw, aproA jection, v, from it brings up against a spring, w, extending fromthe arm K, (see iig. 4.) This spring serves to return the racks intoengagement with the worm-wheels after each may have passed outvofengagement therea with. When the saw-shaft is put invrevolution the sawwill be revolved. The gear H and the several block* carriers, suppliedwith blocks to be reduced to shingles, will also be put in slowrevolution, so as to cause the saw to cut in succession through theblocks. Each block, during its passage around in its orbit ofrevolution, will be advanced toward the plane of the saw, and will beadjusted to a proper position for the saw to again pass or cutthroughit. If the threads of the worm-wheels are regular helices, boardsof an even thickness will be cut from theblocks, but when the threadsare irregular helices, or are bent or curved so as to cause each blockscarriage to be advanced at its ends alternately, the blocks will bereduced to thin wedges or shingles. There may be eight or any othersuitable number of block-carriers in the series. When each of the blocksmay have vbecome cut up into boards or shingles the remnant'ofit may beremoved from thejaws of its carrier and a, fresh block be substituted,such being accomplished whlethe series of block-carriers is inrevolution.

I am aware of the shingle machine described in the United States PatentNo.49,228, and dated August 8,' 1865. This machine, although having'acircular saw and a rotary series of block-carriers, does not have suchblock-carriers operated like mine, and besides, it has a tilting-tableon which leach block, preparatory to being sawed, is dropped, the jawsfor holding the block being operated so as to allow it to fall on and betipped by such table. In my machine no such tilting-table is employed,each block while'being held by the jaws lbeing properly adjustedpreparatory toits contact-with the saw. The operations-and mechanisms ofthe twomachines are essentially di`erent,`although the machines may beproductive of like results.

I ain-also' aware of the machines described in theUnited States PatentsNos. 15,756 and 19,3519, granted to George Crane. In each of thesemachines' 'there is no rotary series ofbloclr-holders, but'only one ortwo blockholding or reciprocating.carriages, cach of` such having, foradjusting the black or bolt of wood, a mechanism analogous to thatemployed in my machine. -I therefore make no claim to a saw] and arotary series of blockcarriers and a tilting-table, -astconstructed,arranged, and made to operate as described and exhibited in the saidPatent No. 49,228. Nor-do I claim the combination of two racks,aworm-wheel, a ratchet and a click, or its equivalent, as applied toareciprocating carriage or block-carrier, and for `advancing andadjusting a block or bolt of wood with respect to a. saw, so that ashingle may be separated fron'such block during each advance of thecarriage. I have but one operative click, P, for the whole series ofratchcts, N, constituting my several mechanisms for advancing andadjust-ing theblocks while being revolved around a common axis.Consequently my mechanism for operating the. several block-carrierscauses each of them to be actuated in successionby being revolved in acommon orbit, and so that these ratchets may be successively carriedagainst the single click. Consequently the single click, the rotaryseries of ratchets, racks` 'and worm-wheels, block-carriers, mechanismfor revolving them in a common orbit, constitute a combination which,when used in connection inmanner as explained, with a circular saw,constitutes a mechanism which, involving several features or mechanismsexhibited in the said patents, yet, as a whole, contains marked anduseful differences, and will operate in a much more effective manner forthe production of shingles.

/ Therefore, what I claim as my invention, is-.

My improved shingle-making machine, as composed of the single click P,the rotary series of ratchets N, worm-Wheel M, racks t t, andblock-carriers L, arranged together, and with a. circular saw and' itsoperative mechanism, and provided with mechanism for supporting andoperating them, substantially as specified.

EMORY B. COOK.

Witnesses R. Hf EDDY, F. P. HALE, Jr.

